Today is the 40th anniversary of Kent State, where four students were shot and killed by Ohio National Guardsmen.
The students were shot during a protest against President Richard Nixon’s invasion of Cambodia, which he had announced on television a few days earlier.
The day after the shootings, students at UC Berkeley launched their own protest. This photo, supplied by the Bancroft Library as part of their “Digital Object of the Day,” shows student protesters walking around Sather Gate. The picture was taken by Theresa Lowenberg on May 5, 1970,